JPH04101301U - Dimmer device for discharge lamp lighting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Control not only the amount of light but also the color temperature of lighting equipment such as spotlights that use discharge lamps as the light source.
To obtain a light control device capable of obtaining illumination light compatible with various performance purposes. [Structure] A sheet 3 having a light-transmitting part 4 and a light-blocking part 5 is wound around two rolls 1 and 2 arranged in parallel, and the sheet is moved in the roll direction by the rotation of the rolls to continuously adjust the transparency. A long color temperature conversion filter 12 is installed across two rolls 10 and 11 arranged in parallel, and the filter is moved in the direction of the rolls by rotation of the rolls. It consists of a roll winding type color temperature control mechanism.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea lights up the discharge lamps used for production lighting in theater stages, television studios, etc. The present invention relates to a dimming device for a lamp such as a spotlight as a source.

0002

[Conventional technology]

When using a discharge lamp as a light source such as a spotlight, it is mainly a high-pressure discharge lamp. However, in general, this type of high-pressure discharge lamp has low electrical power due to the characteristics of the lamp. The light cannot be adjusted. In addition, when a high-pressure discharge lamp is lit or relit, the gas vapor pressure inside the lamp rises and becomes unstable. It takes a certain amount of time to reach the maximum amount of light. Therefore, for use on stage or in a television studio, the lights must be turned on in advance and the mechanical Block out the light to the front with a shading device, and change the aperture of the shading device as necessary. A light control device is used. As a mechanical light control device, there is an iris shutter, which was proposed earlier by the applicant. Various types of systems have been implemented, such as "Shutter device for discharge lamp dimming" (Utility Application No. 1-149167). It is put to practical use.

0003

[Problem that the idea aims to solve]

The iris shutter and other mechanical light control devices mentioned above are all light control devices. It simply changes the ratio of the amount of light passing through the light to the amount of light incident on it, and the color temperature It does not involve a change in degree.

0004 In other words, the color temperature of a discharge lamp changes depending on the type and ratio of the enclosed elements, so the same Even with discharge lamps, there will be slight differences in color temperature, and the color temperature will also change over time. Change occurs. These phenomena are caused by metal halide lamps, which have been widely used in recent years. If you use multiple discharge lamps together, the color temperature will be noticeable. The difference has become a practical problem.

[0005] In addition, in recent years, high-pressure discharge lamps that can be electrically dimmed in the range of approximately 50% to 100% have also been introduced. Although it has been put into practical use, it is said that the color temperature changes significantly with dimming. There are practical difficulties.

[0006] The present invention was devised in view of the above-mentioned problems of the conventional technology, and its purpose is to In lighting equipment such as spotlights that use discharge lamps as a light source, only the amount of light is It is also possible to control the color temperature and obtain illumination light that can be used for a variety of production purposes. The object of the present invention is to provide a light control device that can perform the following functions.

[0007]

[Means to solve the problem]

In order to achieve the above objective, the technical means taken by the present invention are two parallelly arranged A sheet with a light-transmitting part and a light-blocking part is wound around a roll of books, and the roll is rotated. A roll that moves the sheet in the roll direction to continuously change the transparency. The roll-up type dimming shutter mechanism and the long Attach the color temperature conversion filter and move the filter in the direction of the roll by rotating the roll. The present invention is characterized in that it is configured with a roll-winding type color temperature control mechanism that moves.

[0008] The rolls in both of the above mechanisms can be driven manually or remotely by attaching an electric device, etc. It may also be possible to remotely control the machine. It is possible to control the structure independently or in conjunction with each other. Further, the sheet winding device in the roll winding type dimming shutter mechanism described above is as follows: The sheet is formed into an endless ring shape and has two rolls (driving roll and driven roll). The sheet is wound over the entire length, or both longitudinal ends of the sheet are fixed to the drive roll. It can be made into an annular shape, or the folded part of the sheet can be wrapped around a driven roll. It's good.

[0009] The filter used in the roll winding type color temperature control mechanism has several types of color temperature conversion. Filter pieces are successively pasted together from high to low to form a long filter. In addition, the above-mentioned filter includes a first filter part that increases the color temperature, and a filter part that increases the color temperature. It consists of a second filter part that is transparent in color and a third filter part that lowers the color temperature. From the vicinity of the parts of the first and third filters that contact the second filter to the vicinity of the side ends. In addition to distributing the openings, the distribution area ratio is continuously decreased. You can.

0010 Furthermore, the color temperature control by the roll winding type color temperature control mechanism uses a color sensor. detects the color temperature of the output light and automatically compensates for changes in the color temperature of the light source. Good too. Furthermore, a roll-winding type shutter mechanism for dimming and a roll-winding type for color temperature control. The installation direction of the two rolls in the mechanism section is on a plane perpendicular to the optical axis of the lamp. Therefore, the horizontal position of the light emitting and emitting part of the lamp, or the vertical position of the light emitting and emitting part. Alternatively, it may be placed at an oblique position sandwiching the light emitting/emitting part.

[0011]

[Effect]

According to the above means, in claim 1, the roll winding type dimming shutter mechanism unit is configured to be When controlled independently, it is possible to control only the light amount without changing the color temperature. If the roll winding type color temperature control mechanism is also controlled, the color control will be performed in addition to the light amount control. Temperature can be changed. In addition, the roll winding type color temperature control mechanism can be controlled independently. If you control the color temperature, the color temperature will change.

0012 Further, in claim 2, the color temperature can be adjusted by moving the filter in the roll direction. can be changed continuously. Furthermore, in claim 3, the color temperature that occurs when the light source is electrically dimmed is controlled. By changing the corresponding filter according to the change, the color temperature of the output light can be kept constant. Rukoto can.

[0013]

[Effect of the idea]

Since the dimmer device for discharge lamp lighting equipment of the present invention has the above configuration, Depending on the purpose of production, in some cases, only the amount of light can be changed without changing the color temperature. In other cases, as in the dimming of incandescent lamps, the color is dimmed along with the melting. It is possible to perform dimming that increases the temperature and lowers the color temperature as it darkens. I can do it.

[0014] In addition, in the case of the configuration of claim 2, the color temperature change is made with respect to the color temperature of the light source. The color temperature can be precisely controlled from low to high, allowing multiple discharge lamps to It is possible to correct variations in color temperature, which can be a problem when using different ingredients at the same time. . In addition, when using a color temperature conversion filter, it is natural that the light intensity of the light source If this becomes a problem, please interlock the mechanical dimming mechanism. Therefore, the color temperature control section may be operated to compensate for this according to the transmittance. It is something.

[0015] Furthermore, in the case of claim 3, the color temperature of the output light is detected, and the light is determined based on the detected value. Color temperature control can be performed to automatically compensate for changes in the color temperature of the source. When electrically dimming is performed with a lamp whose light source is a high-pressure discharge lamp that can be electrically dimmed Changes in color temperature that occur can be eliminated by linking the color temperature control section. Ru.

[0016]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figures 1 and 2 show the proposed device, and in the figures, A is a roll winding type dimming shutter mechanism. Section B is a roll-type color temperature control mechanism section.

[0017] The roll winding type dimming shutter mechanism part A has a drive roll 1 and a driven roll 2. The sheet 3 is wound vertically, and the length of the sheet 3 has a light transmitting part 4 and a light shielding part 5. Both sides of the sheet 3 in the hand direction are fixed to the drive roll 1 to form the sheet 3 into an annular shape. The curved folded portion is wound around the driven roll 2. Also, a gear 6 is fixed to the drive roll 1. and is rotated by the operation of a motor 7.

[0018] The sheet 3 fixed to the drive roll 1 is made of heat-resistant aluminum foil or stainless steel foil. Using a light-shielding material such as At the same time, mounting portions 8, 8 for the drive roll 1 are provided on both sides of the sheet 3 in the longitudinal direction. ', and the mounting parts 8, 8' are wound around the drive roll 1 and the ends are fixed.

[0019] Therefore, when the drive roll 1 is rotated, the front sheet 3a and the driven roll 2 fold together. The returned rear sheet 3b moves in the roll direction (horizontal direction), and the opening amount of the transmission section increases. adjusted. Note that 9 and 9' are auxiliary rolls that contact the back side of the rear sheet 3b and roll the front sheet 3. a and the rear seat 3b, thereby bringing the front seat 3a and the rear seat 3 closer together. Prevent light from leaking between the

[0020] The roll winding type color temperature control mechanism section B is arranged between the drive roll 10 and the drive roll 11. The side edges of the color temperature conversion filter 12 are fixed to each other, and the left and right drive rolls 10 and 11 are connected to each other. is configured to be driven by a motor 7 and a motor 13. The color temperature conversion filter 12 mentioned above includes several types of color temperature conversion filters as shown in FIG. The pieces 12a, 12b,...12f are sequentially pasted together to form a band shape, and the left and right drive rollers are The filter piece is rolled up in the left and right direction when the wheel rotates, and faces the light emitting and emitting part of the discharge lamp. It can be changed by changing.

[0021] Furthermore, as shown in FIG. 5, the color temperature conversion filter has a first filter that increases the color temperature. filter portion 13a, a colorless and transparent second filter portion 13b, and a second filter portion 13b that lowers the color temperature. It consists of three filter parts 13c, a first filter part 13a and a third filter part 13. The openings 14 are distributed from the vicinity of the part in contact with the second filter part 13b of c to the side end. It is also possible to use a filter 13 in which the distribution area ratio is continuously decreased. It is.

[0022] The first filter portion 13a in the color temperature conversion filter 13 above is attached to a roll. The opening 14 is not provided near the end of the projector, so that this part faces the light emitting part. It is designed so that the light with the highest color temperature value can be obtained when the The openings 14 are distributed toward the connection part side with the second filter part 13b, and the openings 14 are Continuously increase the distribution area ratio occupied by 14. As a result, this part becomes a discharge lamp. When facing the light emitting and emitting part of the tool, the distribution occupied by the opening in that part Light projection with a color temperature value corresponding to the area ratio can be obtained.

[0023] The second filter part 13b is a colorless and transparent filter, and this part is used to emit light from the discharge lamp. The color temperature does not change when facing the radiation part. The third filter part 13c is attached to the roll from the connection part with the second filter part 13b. The openings 14 are distributed toward the attached end, and the distribution area ratio occupied by the openings 14 is continuously calculated. Make it smaller. As a result, the part where the opening 14 is opened becomes the light emitting device of the discharge lamp. If it is arranged to face the irradiation part, it should be adjusted according to the distribution area ratio occupied by the opening in that part. Light with a similar color temperature value can be obtained, and the non-opening area near the roll faces the light emitting part. In this case, light with the lowest color temperature value can be obtained.

[0024] Further, the first filter portion 13a is a blue filter, and the third filter portion 13a is a blue filter. 13c is an amber type filter, and it is installed in the first and third filter parts. The shape of the opening 14 can be selected from any shape such as circular or rectangular. As a method for controlling the light intensity and color temperature as described above, the light intensity control method shown in Fig. 6 is used. Simply adjust the dimming fader 15 and color temperature control fader 16 using a variable resistor (variable resistor). You can use the joystick to control the light intensity and color temperature as shown in Figure 8. 17, there is a way to do it at the same time.

[0025] Additionally, as a means of color temperature control, the color sensor 18 is used to control the output light (modulated light). It can also detect the color temperature of the light source and automatically adjust to compensate for changes in the color temperature of the light source. I can do it. In that case, it is based on the red, blue, and green color light component ratio obtained from the color sensor 18. Then, the filter part with the corresponding conversion degree is used to calculate the light emitted by the discharge lamp. What is necessary is to control it so that it faces the emission part. (See Figure 9)

[0026] The degree of light attenuation in the color temperature control section mentioned above is determined by the type of filter and distribution area ratio. Therefore, if the winding state of the filter is detected using a potentiometer or other method, , it is possible to know the part of the filter that faces the light emitting part, and thereby the degree of light attenuation can be adjusted. I understand. Therefore, it is possible to read out the dimming control signal value stored in ROM etc. in advance, or is converted using a functional formula, etc., and performs mechanical dimming control, and does not involve changes in the amount of light. It is possible to change only the color temperature without changing the color temperature.

[0027] Conversely, if you want to change the color temperature according to the dimming level (light amount), set the desired color temperature in advance. This can be done by storing the change characteristics in ROM etc. or by giving them as a function formula etc. I can do that.

[0028] With the above configuration, the color temperature of the discharge lamp fixture can be controlled within the range of approximately 3000[K] to 6000[K]. You can control the color temperature between each discharge lamp when using multiple units. It is possible to compensate for variations in the color temperature of the light source that occur when electrical dimming is performed. It is something that can compensate for changes.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the device of the present invention.

2 is a sectional view taken along line (2)-(2) in FIG. 1. FIG.

FIG. 3 is a developed view of a sheet used for a dimming shutter.

FIG. 4 is a developed view of a color temperature control filter.

FIG. 5 is a developed view showing another example of a color temperature control filter.

FIG. 6 is an explanatory diagram showing a dimming control method.

FIG. 7 is a front view of a fader that performs dimming control.

FIG. 8 is a front view of a joystick that performs dimming control.

FIG. 9 is a schematic diagram showing how the light control device is attached.

FIG. 10 is a perspective view of the filter of FIG. 5;

FIG. 11 is a diagram showing color temperature changes of a metal halide lamp for a light source.

FIG. 12 is a diagram showing variations in initial color temperature values of metal halide lamps.

FIG. 13 is a diagram showing a change in color temperature of a light source due to electrical dimming.

[Explanation of symbols]

A: Roll winding type dimming shutter mechanism part B: Roll winding type color temperature control mechanism part 1, 2, 10, 11: Roll 3: Sheet 4, 4': Light transmitting part 5: Light shielding part 12, 13: Color temperature conversion filter 14: Aperture 15, 16: Fader 17: Joystick 18: Color sensor

Claims (3)

[Scope of utility model registration request] Claim 1: A light control device for lighting equipment, which uses a discharge lamp as a light source and consists of an optical system in which reflective mirrors, lenses, etc. A roll-winding type dimming shutter mechanism unit that winds a sheet having a section and moves the sheet in the roll direction by rotation of the roll to continuously change the transparency, and two rolls arranged in parallel. It consists of a roll-winding type color temperature control mechanism that attaches a long color temperature conversion filter across the entire length and moves the filter in the direction of the roll as the roll rotates, and controls each control level independently or in conjunction with each other. A dimmer device for discharge lamp lighting equipment that is characterized by being able to 2. The filter used in the roll-type color temperature control mechanism includes a first filter portion that increases the color temperature, a second colorless and transparent filter portion, and a third filter portion that decreases the color temperature. 2. The filter according to claim 1, wherein the openings are distributed from the vicinity of the portion of the first and third filters in contact with the second filter to the vicinity of the side ends, and the distribution area ratio thereof is continuously decreased. Dimmer device for discharge lamp lighting equipment 3. The adjustment for a discharge lamp lighting fixture according to claim 1 or 2, wherein the color temperature of the output light is detected using a color sensor, and the color temperature is controlled so as to automatically compensate for changes in the color temperature of the light source. optical device